CN106428399A - Bicycle sprocket and multiple bicycle sprocket asembly - Google Patents
Bicycle sprocket and multiple bicycle sprocket asembly Download PDFInfo
- Publication number
- CN106428399A CN106428399A CN201611085719.5A CN201611085719A CN106428399A CN 106428399 A CN106428399 A CN 106428399A CN 201611085719 A CN201611085719 A CN 201611085719A CN 106428399 A CN106428399 A CN 106428399A
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- China
- Prior art keywords
- aforementioned
- tooth
- sprocket
- sprocket wheel
- chain
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
- B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
- B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M1/00—Rider propulsion of wheeled vehicles
- B62M1/36—Rider propulsion of wheeled vehicles with rotary cranks, e.g. with pedal cranks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
- B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
- B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
- B62M9/105—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like involving front sprocket chain-wheels engaged by the chain, belt or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/30—Chain-wheels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2164—Cranks and pedals
- Y10T74/2165—Cranks and pedals with attached gear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Gears, Cams (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
A bicycle sprocket has a sprocket main body, a plurality of teeth disposed on the sprocket main body, and at least one shifting area. The teeth include at least one first tooth having a first maximum axial width and at least one second tooth having a second maximum axial width. The first maximum axial width is larger than the second maximum axial width. The first tooth is configured to engage with an outer link plate of a chain. The second tooth is configured to engage with an inner link plate of the chain. The at least one shifting area includes an area where a chain engages with one of the teeth during shifting from a small sprocket to the bicycle sprocket and an area where the chain separates from one of the teeth during a shifting action from the bicycle sprocket to the small sprocket.
Description
It is December 18, invention name in 2013 that present patent application is the Application No. 201310697890.1, applying date
The divisional application of the referred to as application for a patent for invention of " bicycle sprocket and bicycle crank assembly ".
Technical field
The present invention relates to bicycle sprocket and possessing the bicycle crank assembly of bicycle sprocket.
Background technology
Bicycle sprocket is separately positioned on the crank assembly of the central part for being configured at bicycle and trailing wheel, by with
The chain of sprocket engagement, the rotation of crank assembly is transmitted to trailing wheel.In the chain of bicycle, due to inner link plate and outward
Link plate is alternately linked, so, if the thickness of the tooth of sprocket wheel is identical, chain in the gap-ratio of the tooth of link plate and sprocket wheel
The gap of the tooth of section plate and sprocket wheel is big.Therefore, the center of rotation direction of principal axis of sprocket wheel is just known in the past, with regard to the direction of principal axis width of tooth
Degree (thickness of tooth), the direction of principal axis width of the tooth for making the direction of principal axis width ratio of the tooth for engaging with link plate engage with inner link plate
Big sprocket wheel (for example, No. 4174642 description of United States Patent (USP)).Conventional sprocket wheel has tapering tooth towards on the outside of the direction of footpath.
Accordingly, the gap of sprocket wheel and chain diminishes, and chain is difficult to leave from the tooth of sprocket wheel.
On the other hand, bicycle crank assembly possesses crank arm and sprocket wheel.In this bicycle crank assembly
In, it is known that multiple sprocket wheels different for the number of teeth are assemblied in the bicycle crank assembly of crank arm.Multiple sprocket wheels are used for speed change
And arrange, so that chain is moved between two different sprocket wheels of the number of teeth by derailleur, carry out gear shifting operation.
For the center of rotation direction of principal axis of sprocket wheel, the sprocket wheel with the different tooth of direction of principal axis width be for prevent chain from
The construction that the tooth of sprocket wheel is left easily.If for this purpose, adopting the conventional crank assembly that chain is moved between two sprocket wheels
With the sprocket wheel of the tooth different with direction of principal axis width, then gear shifting operation becomes difficult.
The problem of the present invention is in the sprocket wheel of the tooth different with direction of principal axis width, easily carries out gear shifting operation.
Content of the invention
Bicycle sprocket for the present invention has Pivot axle, can engage with chain.Bicycle sprocket possesses
Sprocket body, the multiple teeth being configured on the outside of the footpath direction of sprocket body in the circumferential direction, at least one speed change region.Multiple teeth
Including at least one the 1st teeth with the 1st maximum direction of principal axis width, have at least one the 2nd of the 2nd maximum direction of principal axis width
Tooth, the 2nd maximum direction of principal axis width of the 1st maximum direction of principal axis width ratio is big.1st tooth is formed can be with the outer link board of chain
Close.2nd tooth is formed to close with the inner link board of chain.
In the bicycle sprocket, chain is assembled on sprocket wheel, the 1st tooth for making direction of principal axis width big and outer link card
Close, so that the 2nd little tooth of direction of principal axis width compared with the 1st tooth is engaged with inner link.And, if chain arrangement is being carried out to chain
At least one speed change region of guiding, to make chain easily leave from the tooth of sprocket wheel for speed change, then chain is by other chains
Wheel-guiding is simultaneously mobile.Here, because at least one speed change region is arranged on sprocket wheel, with direction of principal axis width not
In the sprocket wheel of same tooth, gear shifting operation is easily carried out.
Can also be that multiple teeth include multiple 1st teeth.In this case, bicycle sprocket can effectively keep chain
The outer link of bar.
Can also be that multiple teeth include multiple 2nd teeth.In this case, bicycle sprocket can effectively keep chain
The inner link of bar.
Can also be that multiple teeth include multiple 1st teeth and multiple 2nd teeth.In this case, bicycle sprocket energy
Enough outer links for effectively keeping chain and inner link.
Can also be multiple 1st teeth and multiple 2nd teeth at least a portion in the circumferential direction alternately configured.In this feelings
Under condition, chain can be more efficiently prevented from and left from the tooth of sprocket wheel easily.
Can also be that the 1st tooth is seen from the outside of the direction of footpath and is formed+shape.In this case, due to be not make whole
The direction of principal axis width of body becomes big, but makes a part become big, so, even if making direction of principal axis width become big, it is also possible to prevent sprocket wheel
Weight exceed necessarily increase.
Can also be that the 1st tooth is seen from the outside of the direction of footpath and is formed T-shaped.In this case, due to be not make whole
The direction of principal axis width of body becomes big, but makes a part become big, so, even if making direction of principal axis width become big, it is also possible to prevent sprocket wheel
Weight exceed necessarily increase.
Can also be the scope of the 1st maximum direction of principal axis width in more than 2.5mm, below 5.4mm of the 1st tooth.In this feelings
Under condition, the 1st tooth can be made not engage with inner link, but engaged with outer link.
Can also be the scope of the 1st maximum direction of principal axis width in more than 3.0mm, below 4.5mm of the 1st tooth.In this feelings
Under condition, even the chain of multistage rear sprocket wheel assemblies more than 10 grades of speed changes, it is also possible to make the 1st tooth with outer link positively
Engaging.
Can also be the scope of the 2nd maximum direction of principal axis width in more than 1.5mm, below 2.3mm of the 2nd tooth.In this feelings
Under condition, the 2nd tooth can be made positively to engage with inner link.
It can also be the gear teeth at least on any one that speed change region includes to be arranged on multiple teeth.Because speed-change area
Domain contain the shape for being formed easily to make chain leave from the tooth of sprocket wheel or make from other sprocket wheels movement come chain and
The gear teeth of the shape that the tooth of sprocket wheel easily engages, thus it is possible to sleekly carry out gear shifting operation.
Can also be that gear teeth has the spigot surface guided by chain.In this case, because by gear teeth
Spigot surface guides chain, so, round and smooth gear shifting operation can be carried out.
It can also be at least one projection that speed change region includes to be formed can support chain.In this case, because
Be sprocket wheel from the sprocket wheel from path side to big footpath side guiding chain when, can by projection big footpath side sprocket wheel support chains,
So, chain is easily moved to the sprocket wheel of big footpath side.
Can also be the 1st projection and the 2nd projection that at least one projection includes to be formed can support chain.This
In the case of, by the 1st projection and the 2nd projection are configured in different positions in the footpath direction of sprocket wheel, can be by the 1st nipple support
Chain is guided to the tooth of sprocket wheel to the 2nd raised guiding from the 2nd nipple support chain.For this purpose, chain is easily to the sprocket wheel of big footpath side
Mobile.
Can also be at least one party of the outer link and the inner link of chain of the 1st projection and the 2nd distance of protrusion than chain
Long side direction length long.In this case, by by the respective different of the 1st projection and the 2nd nipple support chain
Chain link, can be in support chains on a large scale.
Can also be at least one party of the outer link and the inner link of chain of the 1st projection and the 2nd distance of protrusion with chain
Long side direction length compare identical or short.By a chain link by the 1st projection and the 2nd nipple support chain, can be true
Support chains on the spot.
Can also be that speed change region includes to be configured in the recess on the inside of the footpath direction compared with the bottom of the tooth portion of multiple teeth.?
In this case, because chain can be guided by recess on the inside of the footpath direction compared with bottom of the tooth portion, thus it is possible to effectively will
Chain is to the chain Wheel-guiding of big footpath side.
It is multiple to be that speed change region is set.In this case, by by multiple speed change regions for example in Zhou Fang
To being provided spaced apart, gear shifting operation can be promptly carried out.
Can also be that speed change region is set to a pair less.In this case, by multiple speed change regions are for example existed
Circumferential direction is provided spaced apart at least one pair of, even if the speed change region gear shifting operation in a side is not completed, it is also possible to another
The speed change region of side completes gear shifting operation.
Can also be bicycle sprocket for the present invention be front sprocket wheel.In this case, using the teaching of the invention it is possible to provide usual
Pedaling in, can stably keep chain, and the front sprocket wheel of gear shifting operation can also be carried out simultaneously.
The bicycle crank assembly of other invention for the present invention possesses crank arm, multiple sprocket wheels.Multiple chains
Wheel includes the 1st sprocket wheel.1st sprocket wheel have the 1st sprocket body, in the circumferential direction interval be configured in the footpath of the 1st sprocket body
Multiple teeth on the outside of direction.Multiple teeth include at least one the 1st teeth with the 1st maximum direction of principal axis width, have the 2nd greatest axis
At least one the 2nd teeth of direction width.The 2nd maximum direction of principal axis width of 1st maximum direction of principal axis width ratio is big.1st tooth is formed
Can engage with the link plate of chain.2nd tooth is formed to close with the inner link board of chain.
In the crank assembly, the 1st sprocket wheel includes the 2nd little tooth of the 1st tooth and the 1st tooth of direction of principal axis width ratio.In addition, the
1 tooth can be engaged with the link plate of chain, and the 2nd tooth can be closed with inner link board.For this purpose, in the 1st sprocket wheel, scrunching common
In action, chain can be stably kept.
Can also be that multiple sprocket wheels include the number of teeth 2nd sprocket wheel different from the 1st sprocket wheel.2nd sprocket wheel has the 2nd sprocket wheel master
Body, in the circumferential direction interval be configured in the multiple teeth on the outside of the footpath direction of the 2nd sprocket body.Multiple teeth are included with the 3rd
At least one the 3rd teeth of maximum direction of principal axis width, at least one the 4th teeth with the 4th maximum direction of principal axis width.3rd greatest axis
The maximum direction of principal axis width of direction width ratio the 4th is big.3rd tooth is formed to engage with the link plate of chain.4th tooth is formed
For closing with the inner link board of chain.
In this case, in the 2nd sprocket wheel, in common pedaling, chain stably can be kept.
Can also be that multiple sprocket wheels include the number of teeth 3rd sprocket wheel different from the 1st sprocket wheel and the 2nd sprocket wheel.3rd sprocket wheel has
3rd sprocket body, in the circumferential direction interval be configured in the multiple teeth on the outside of the footpath direction of the 3rd sprocket body.Multiple tooth bags
Include at least one the 5th teeth with the 5th maximum direction of principal axis width, at least one the 6th teeth with the 6th maximum direction of principal axis width.
The 6th maximum direction of principal axis width of 5th maximum direction of principal axis width ratio is big.5th tooth is formed to engage with the link plate of chain.The
6 teeth are formed to close with the inner link board of chain.
In this case, in the 3rd sprocket wheel, in common pedaling, chain stably can be kept.
Can also be that the 1st sprocket wheel number of teeth compared with the 2nd sprocket wheel is many.
Can also be that the 1st sprocket wheel number of teeth compared with the 2nd sprocket wheel and the 3rd sprocket wheel is many.
Can also be that the 2nd sprocket wheel number of teeth compared with the 3rd sprocket wheel is many.
Can also be that the 1st sprocket wheel has at least one speed change region.In this case, even if making the 1st sprocket wheel usual
Pedaling in can stably keep chain, it is also possible to easily carry out the gear shifting operation with respect to the 1st sprocket wheel.
Can also be that the 2nd sprocket wheel has at least one speed change region.In this case, even if making the 2nd sprocket wheel usual
Pedaling in can stably keep chain, it is also possible to easily carry out the gear shifting operation with respect to the 2nd sprocket wheel.
Can also be that the 3rd sprocket wheel has at least one speed change region.In this case, even if making the 3rd sprocket wheel usual
Pedaling in can stably keep chain, it is also possible to easily carry out the gear shifting operation with respect to the 3rd sprocket wheel.
Invention effect
According to the present invention, because at least one speed change region is arranged on sprocket wheel, with direction of principal axis width not
In the sprocket wheel of same tooth, gear shifting operation is easily carried out.
According to the other invention of the present invention, in the 1st sprocket wheel, chain can be stably kept in common pedaling
Bar.
Description of the drawings
Fig. 1 is the front view of the bicycle crank assembly of the 1st embodiment based on the present invention.
Fig. 2 is the front perspective view of the 1st sprocket wheel.
Fig. 3 is the rearview of the 1st sprocket wheel.
Fig. 4 is the rear perspective Local map of the 1st and the 2nd sprocket wheel.
Fig. 5 is the side sectional partial view for seeing the 1st sprocket wheel, the 2nd sprocket wheel or the 3rd sprocket wheel from the outside of the direction of footpath.
Fig. 6 is the front perspective view of the 2nd sprocket wheel.
Fig. 7 is the front view of the bicycle crank assembly of the 2nd embodiment based on the present invention.
Fig. 8 is the exterior view of the 3rd sprocket wheel.
Specific embodiment
In Fig. 1, the bicycle crank assembly based on the 1st embodiment of the present invention is (identified below for crank assembling
Body) 10 possess crank arm 12, the 1st sprocket wheel 14 as the bicycle sprocket based on one embodiment of the present invention, the 2nd sprocket wheel
16.1st sprocket wheel 14 and the 2nd sprocket wheel 16 are the front sprocket wheels that can engage with chain 2.2nd sprocket wheel 16 number of teeth compared with the 1st sprocket wheel 14
Few.Chain 2 is with link plate 2a and inner link plate 2b.
<Crank arm>
Crank arm 12 integrally rotatably can be linked with crank axle 19.Crank arm 12 is pacified with sprocket wheel installation portion 20 and sprocket wheel
The arm 22 that 20 one of dress portion or split are arranged.
Sprocket wheel installation portion 20 have in the circumferential direction multiple (such as 4) sprocket wheel installing arms 24 for being configured of interval.Chain
The interval of the circumferential direction of wheel installing arm 24 can be at equal intervals, or unequal interval.In the 1st embodiment, sprocket wheel is pacified
Dress arm 24 is equally spaced configured, and crooked to the upstream side of the traveling direction of rotation R of crank arm 12 with respect to footpath direction.Sprocket wheel
Installing arm 24, is formed in and the 1st installation portion for the 1st installation portion 24a of the 1st sprocket wheel 14 of installation with its leading section is formed in
On the inside of the footpath direction that 24a is compared, for installing the 2nd installation portion 24b of the 2nd sprocket wheel 16.1st installation portion 24a and the 2nd installation portion
24b is for example made up of through hole or the screwed hole having no through etc..In the 1st embodiment, the 1st installation portion 24a is by insertion
Hole is constituted, and the 2nd installation portion 24b is made up of the screwed hole having no through.1st sprocket wheel 14 is fixed on the 1st peace by the 1st fixing bolt 26
Dress portion 24a.2nd sprocket wheel 16 is fixed on the 2nd installation portion 24b by the 2nd fixing bolt 28 (referring to Fig. 4).
Arm 22 is formed with 20 one of sprocket wheel installation portion or split ground.In the 1st embodiment, arm 22 is installed with sprocket wheel
Portion 20 forms.Arm 22 has the pedal installation portion 22a that can assemble pedal (not shown) in front, in base end side
There is connecting hole 22b that can have integrally rotatably linked crank axle 19.
<1st sprocket wheel>
1st sprocket wheel 14 as shown in Figures 2 to 5, with Pivot axle X, and possess the 1st sprocket body 30, along Zhou Fang
To multiple (such as 30 to the 60) teeth 32 being configured on the outside of the footpath direction of the 1st sprocket body 30, the 1st speed change region 34.
1st sprocket body 30 is of sprocket body.1st speed change region 34 is of speed change region.Speed-change area in the present invention
Domain representation when the rising gear shifting operation from minor sprocket to big sprocket wheel is carried out, region that chain is engaged with the tooth of big sprocket wheel or
When carrying out the decline gear shifting operation from big sprocket wheel to minor sprocket, the region that chain is left from the tooth of big sprocket wheel.1st sprocket body 30
And multiple teeth 32 are metal system, to be integrally formed.1st sprocket body 30 has the 1st peace for being fixed on sprocket wheel installing arm 24
On dress portion 24a in the circumferential direction multiple (such as 4) the 1st fixed part 30a for being configured of interval.1st fixed part 30a is
In 1 embodiment, it is made up of through hole, is configured in the position opposite with multiple 1st installation portion 24a.1st sprocket wheel 14 is by the 1st
Fixing bolt 26 and the nut part (not shown) for being screwed with the 1st fixing bolt 26 are fixed in sprocket wheel installing arm 24.
Multiple teeth 32 are for example set 36 in the 1st embodiment.Multiple teeth 32 are included with the 1st maximum direction of principal axis width
At least one the 1st tooth 32a of degree W1 (referring to Fig. 5), at least one the 2nd tooth 32b with the 2nd maximum direction of principal axis width W2.1st
Tooth 32a is formed to engage with the link plate 2a of chain 2.2nd tooth 32b is formed can be with the inner link plate 2b of chain 2
Engaging.1st maximum direction of principal axis width W1 is bigger than the 2nd maximum direction of principal axis width W2.The 1st maximum direction of principal axis width W1 of the 1st tooth 32a
It is preferred that in the scope of more than 2.5mm, below 5.4mm, more preferably in more than 3.0mm, the scope of below 4.5mm.If the 1st tooth 32a
The 1st maximum direction of principal axis width W1 be in such scope, then the 1st tooth 32a is not engaged with inner link plate 2b, but easily with outward
Link plate 2a engages.The 2nd maximum direction of principal axis width W2 of the 2nd tooth 32b is preferably in the scope of more than 1.5mm, below 2.3mm.If
The 2nd maximum direction of principal axis width W2 of the 2nd tooth 32b is in such scope, then the 2nd tooth 32b guarantees necessary rigidity, and easily with
Inner link plate 2b engages.
As shown in Figures 2 to 5, preferably the 1st tooth 32a sees from the outside of the direction of footpath and is formed+(just) shape.On the other hand,
It is preferred that the 2nd tooth 32b is seen from the outside of the direction of footpath is formed-(bearing) shape.In addition, the 1st tooth 32a and the 2nd tooth 32b are as direction of principal axis
Width taper into like that towards on the outside of the direction of footpath be formed tapering.Accordingly, the 1st tooth 32a and the 2nd tooth 32b be easier with
Link plate 2a and inner link plate 2b engaging.In addition, as shown in Fig. 2 in the 1st embodiment, in multiple 1st tooth 32a
The 1st tooth 32a1 and the 1st tooth 32a2 for becoming gear teeth 32c described later sees from the outside of the direction of footpath and is formed T-shaped.1st tooth
32a1 be for carrying out gear teeth 32c of the decline speed change that chain 2 is moved, the 1st tooth 32a2 from the 1st sprocket wheel 14 to the 2nd sprocket wheel 16
Be for carrying out gear teeth 32c of the rising speed change that chain 2 is moved from the 2nd sprocket wheel 16 to the 1st sprocket wheel 14.In the 1st embodiment
In, the 1st maximum direction of principal axis width of the 1st tooth 32a1,32a2 of T-shaped is formed must be than the 1st greatest axis of the 1st tooth 32a of+shape
Width W1 is little in direction, bigger than the 2nd maximum direction of principal axis width W2 of the 2nd tooth 32b of-shape.
As shown in Fig. 2 at least a portion of the 1st tooth 32a and the 2nd tooth 32b is in the 1st embodiment, be all in Zhou Fang
To by alternately, i.e., it is adjacent to configuration.
1st speed change region 34 includes to be arranged on the 1st gear teeth 32c at least on any one of multiple teeth 32.1st becomes
Fast tooth 32c is of gear teeth.In the 1st embodiment, the 1st gear teeth 32c is set multiple (such as 4).1st speed change
Tooth 32c is arranged on continuous 1st tooth 32a1 and the 2nd tooth 32b.In addition, the 1st speed change region 34 includes to be formed can support
1st projection 36a of chain 2, the 2nd projection 36b.1st projection 36a and the 2nd projection 36b are of projection.Further, the 1st becomes
Fast region 34 includes to be configured in the recess 38 on the inside of the footpath direction compared with the bottom of the tooth of multiple teeth 32.
As shown in FIG. 2 and 3, the 1st gear teeth 32c is in the 1st face 14a (referring to Fig. 2) side of the 1st sprocket wheel 14 and the 2nd face
14b (referring to Fig. 3) side has the 1st spigot surface 32d guided by chain 2.1st spigot surface 32d is of spigot surface.This
In, the 1st face 14a of the 1st sprocket wheel 14 is when crank assembly 10 is assembled on bicycle, is configured in away from bicycle
The front in the axial outside of vehicle frame, the 2nd face 14b is to be configured in the back of the body on the inside of near the direction of principal axis of the vehicle frame of bicycle
Face.It is gradually thinning towards the sidepiece of the 1st gear teeth 32c that 1st spigot surface 32d is become thickness by canyon topography.
1st projection 36a is prominent in the 2nd face 14b of the 1st sprocket body 30 to the guiding chain 2 of tooth 32 of the 1st sprocket wheel 14
Be set.2nd projection 36b be to the 1st raised 36a guiding chain 2 and the 1st sprocket body 30 the 2nd face 14b highlightedly by
Arrange.In the 1st embodiment, the 1st projection 36a and the 2nd projection 36b in the circumferential direction interval be set a pair (many
Individual).1st projection 36a uses hachure in Fig. 3 of the upstream side of the traveling direction of rotation R of the crank assembly 10 of the 1st raised 36a
The 2nd tooth 32b guiding chain for representing.
As shown in figure 1, the 1st projection 36a and the 2nd projection 36b apart from L1 than the link plate 2a of chain 2 and chain 2
The long side direction length L2 length of at least one party of inner link plate 2b.Alternatively, it is also possible to make the 1st projection 36a and the 2nd projection 36b
Apart from L1 identical with long side direction length L2 of at least one party of the inner link plate 2b of the link plate 2a of chain 2 and chain 2 or
Person is shorter than long side direction length L2.1st projection 36a and the 2nd projection 36b are fixed on the 1st sprocket wheel 14 by plastic deformation,
Exactly fixed by so-called riveting fixation.In the present embodiment, the 1st projection 36a is big with the 2nd projection 36b phase diameter group.
As shown in Figure 3 and 4, recess 38 be in order that the chain 2 that is supported in the 1st projection 36a easily and sprocket wheel
14 tooth engages and is formed.Therefore, recess 38 is close to the 1st projection 36a, and is configured in and multiple teeth in the 1st face 14a
On the inside of the footpath direction that 32 bottom of the tooth portion compares.In the 1st embodiment, recess 38 is configured in the traveling rotation of the 1st projection 36a
The downstream of direction R, is become (the clockwise direction of Fig. 3) to the upstream side by canyon topography and inclines from footpath direction Inside To Outside
Roughly triangular shape.Accordingly, chain 2 is easily supported on the 1st projection 36a.
<2nd sprocket wheel>
2nd sprocket wheel 16 with Pivot axle Y, and possesses the 2nd sprocket body 40, edge week as shown in Fig. 4 and Fig. 6
Direction is configured in multiple (such as 20 to the 40) teeth 42 on the outside of the footpath direction of the 2nd sprocket body 40, the 2nd speed change region
44.2nd sprocket body 40 is of sprocket body.2nd speed change region 44 is of speed change region.2nd sprocket body 40
And multiple teeth 42 are metal system, to be integrally formed.2nd sprocket body 40 has the 2nd peace for being fixed on sprocket wheel installing arm 24
In dress portion 24b (referring to Fig. 1) in the circumferential direction multiple (such as 4) the 2nd fixed part 40a for being configured of interval.2nd fixes
Portion 40a is made up of through hole, is configured in the position opposite with multiple 2nd installation portion 24b.2nd sprocket wheel 16 by with the 2nd installation portion
The 2nd fixing bolt 28 (referring to Fig. 4) that 24b is screwed is fixed on sprocket wheel installing arm 24.
Multiple teeth 42 include at least one the 3rd tooth 42a with the 3rd maximum direction of principal axis width W3 (referring to Fig. 5), have the
At least one the 4th tooth 42b of 4 maximum direction of principal axis width W4.3rd tooth 42a is formed can be with the link plate 2a card of chain 2
Close.4th tooth 42b is formed to engage with the inner link plate 2b of chain 2.3rd maximum direction of principal axis width W3 is than the 4th greatest axis side
Big to width W4.The 3rd maximum direction of principal axis width W3 of the 3rd tooth 42a is preferably in the scope of more than 2.5mm, below 5.4mm, more excellent
It is selected in the scope of more than 3.0mm, below 4.5mm.If the maximum direction of principal axis width W3 in the 3rd of the 3rd tooth 42a is in such scope,
Then the 3rd tooth 42a is not engaged with inner link plate 2b, but is easily engaged with link plate 2a.The 4th greatest axis side of the 4th tooth 42b
To width W4 preferably in the scope of more than 1.5mm, below 2.3mm.If the maximum direction of principal axis width W4 in the 4th of the 4th tooth 42b is in this
The scope of sample, then the 4th tooth 42b guarantee necessary rigidity, and easily engage with inner link plate 2b.
As shown in Fig. 4, Fig. 5 and Fig. 6, the 3rd tooth 42a sees from the outside of the direction of footpath and is formed+(just) shape.The opposing party
Face, the 4th tooth 42b sees from the outside of the direction of footpath and is formed-(bearing) shape.In addition, the 3rd tooth 42a and the 4th tooth 42b is by tapering
Formed, to taper on the outside of the direction of direction of principal axis width whereabouts footpath.Accordingly, the 3rd tooth 42a and the 4th tooth 42b be easier with outer
Link plate 2a and inner link plate 2b engaging.
As shown in fig. 6, at least a portion of the 3rd tooth 42a and the 4th tooth 42b is in the 1st embodiment, be all in Zhou Fang
To alternately, being i.e. adjacent to configuration.
2nd speed change region 44 includes to be arranged on the 2nd gear teeth 42c at least on any one of multiple teeth 42.2nd becomes
Fast tooth 42c is of gear teeth.In the 1st embodiment, the 2nd gear teeth 42c is set multiple (such as two).2nd becomes
Fast tooth 42c in the circumferential direction interval be set.As shown in Fig. 4 and Fig. 6, the 2nd gear teeth 42c is in the 1st face of the 2nd sprocket wheel 16
16a (referring to Fig. 6) side and the 2nd face 16b (referring to Fig. 4) side have the 2nd spigot surface 42d guided by chain 2.2nd is oriented to
Face 42d is of spigot surface.Here, the 1st face 16a of the 2nd sprocket wheel 16 is that crank assembly 10 is being assemblied on bicycle
When, the front in the axial outside of the vehicle frame being configured in away from bicycle, the 2nd face 16b is configured near bicycle
Vehicle frame direction of principal axis on the inside of the back side.2nd spigot surface 42d hollowly forms the sidepiece of thickness the 2nd gear teeth 42c of direction gradually
Thinning.
In the 1st embodiment, the 2nd speed change region 44 does not include the projection and recess that the 1st speed change region 34 has.
However, it can be the 2nd speed change region include projection and recess at least any one.
<Gear shifting operation in crank assembly>
In the crank assembly 10 of such structure, from front chain mover (not shown) from the 2nd sprocket wheel 16 to the 1st chain
In the case that wheel 14 carries out rising gear shifting operation, crank assembly 10 is made to rotate to traveling direction of rotation R.In this condition, if
Front chain mover is moved from the position opposite with the 2nd sprocket wheel 16 to the position opposite with the 1st sprocket wheel 14, then chain 2 is from the 2nd sprocket wheel 16
Tooth leave.The chain 2 that have left from the 2nd sprocket wheel 16 is supported by the 2nd projection 36b, the side shifting to outside the direction of footpath, and then, by the 1st
Projection 36a is supported, and the tooth 32 to the 1st sprocket wheel 14 is directed.Now, from the recess 38 in the 1st speed change region 34 to the 1st raised 36a
Guiding chain 2.For this purpose, the chain 2 for being supported by the 2nd projection 36b is positively supported by the 1st projection 36a.
In the case of decline gear shifting operation is carried out from the 1st sprocket wheel 14 to the 2nd sprocket wheel 16 from front chain mover (not shown),
Crank assembly 10 is made to rotate to traveling direction of rotation R.In this condition, if front chain mover is from the position opposite with the 1st sprocket wheel 14
Put to the position opposite with the 2nd sprocket wheel 16 and move, then chain 2 is left from the tooth of the 1st sprocket wheel 14.Have left from the 1st sprocket wheel 14
Chain 2 is directed towards the tooth 42 of the 2nd sprocket wheel 16, is engaged with tooth 42.
<2nd embodiment>
In the 1st embodiment, crank assembly 10 has the 1st sprocket wheel 14 and the 2nd sprocket wheel 16, but, as Fig. 7 institute
Show, the crank assembly 110 of the 2nd embodiment is also equipped with the 3rd sprocket wheel 18 on the basis of the 1st sprocket wheel 14 and the 2nd sprocket wheel 16.
3rd sprocket wheel 18 number of teeth compared with the 2nd sprocket wheel 16 is few.Because the 1st sprocket wheel 14 and the 2nd sprocket wheel 16 are identical with the 1st embodiment
Structure, so, Fig. 7 mark identical symbol, the description thereof will be omitted.
<3rd sprocket wheel>
3rd sprocket wheel 18 is as shown in figure 8, with Pivot axle Z, and possesses the 3rd sprocket body 50, joined in the circumferential direction
Put multiple (such as 20 to 30) teeth 52 on the outside of the footpath direction of the 3rd sprocket body 50, the 3rd speed change region 54.3rd sprocket wheel
Main body 50 is of sprocket body.3rd speed change region 54 is of speed change region.3rd sprocket body 50 and multiple teeth
52 is metal system, is integrally formed.5th sprocket body 50 has the 2nd installation portion 24b (ginseng for being fixed on sprocket wheel installing arm 24
See Fig. 1) in the circumferential direction multiple (such as 4) the 3rd fixed part 50a for being configured of interval.3rd fixed part 50a is by insertion
Hole is constituted, and is configured in the position opposite with multiple 2nd installation portion 24b.3rd sprocket wheel 18 is by for screwing with the 2nd installation portion 24b
2 fixing bolts 28 (referring to Fig. 4) are fixed on sprocket wheel installing arm 24 together with the 2nd sprocket wheel 16.
Multiple teeth 52 include at least one the 5th tooth 52a with the 5th maximum direction of principal axis width W5 (referring to Fig. 5), have the
At least one the 6th tooth 52b of 6 maximum direction of principal axis width W6.5th tooth 52a is formed can be with the link plate 2a card of chain 2
Close.6th tooth 52b is formed to engage with the inner link plate 2b of chain 2.5th maximum direction of principal axis width W5 is than the 6th greatest axis side
Big to width W6.The 5th maximum direction of principal axis width W5 of the 5th tooth 52a is preferably in the scope of more than 2.5mm, below 5.4mm, more excellent
It is selected in the scope of more than 3.0mm, below 4.5mm.If the maximum direction of principal axis width W5 in the 5th of the 5th tooth 52a is in such scope,
Then the 5th tooth 52a is not engaged with inner link plate 2b, but is easily engaged with link plate 2a.The maximum direction of principal axis in the 6th of 6th tooth 52b
Width W6 is preferably in the scope of more than 1.5mm, below 2.3mm.If the maximum direction of principal axis width W6 in the 4th of the 6th tooth 52b is in so
Scope, then the 6th tooth 52b guarantee necessary rigidity, and easily engage with inner link plate 2b.
As shown in Fig. 5 and Fig. 8, the 5th tooth 52a sees from the outside of the direction of footpath and is formed+(just) shape.On the other hand, the 6th
Tooth 52b sees from the outside of the direction of footpath and is formed-(bearing) shape.In addition, the 5th tooth 52a and the 6th tooth 52b be formed tapering, with
Just direction of principal axis width is tapered into towards on the outside of the direction of footpath.Accordingly, the 5th tooth 52a and the 6th tooth 52b is easier and link plate
2a and inner link plate 2b engaging.
As shown in figure 8, at least a portion of the 5th tooth 52a and the 6th tooth 52b is in the 2nd embodiment, be all in Zhou Fang
To alternately, being i.e. adjacent to configuration.
3rd speed change region 54 includes to be arranged on the 3rd gear teeth 52c at least on any one of multiple teeth 52.The 2nd
In embodiment, the 3rd gear teeth 52c is set multiple (such as two).3rd gear teeth 52c in the circumferential direction interval set
Put.As shown in figure 8, the 3rd gear teeth 52c is in the 1st face 18a (referring to Fig. 8) side of the 3rd sprocket wheel 18 and the 2nd surface side (not shown)
There is the 3rd spigot surface 52d guided by chain 2.3rd spigot surface 52d is of spigot surface.Here, the 3rd sprocket wheel 18
1st face 18a be when crank assembly 10 is assemblied on bicycle, the vehicle frame that is configured in away from bicycle axial
The front in outside, the 2nd face is to be configured in the back side on the inside of near the direction of principal axis of the vehicle frame of bicycle.3rd spigot surface 52d is recessed
The sidepiece for being formed as thickness sunkenly towards the 3rd gear teeth 52c is gradually thinning.
In the 3rd embodiment, the 3rd speed change region 54 does not include the projection and recess that the 1st speed change region 34 has.
However, it can be the 3rd speed change region include projection and recess at least any one.
<Other embodiments>
Above, one embodiment of the present invention is illustrated, but, the present invention is not to be limited by above-mentioned embodiment
Fixed invention, can carry out various changes in the range of the purport without departing from invention.This specification multiple are especially written into
Embodiment and variation arbitrarily can be combined as needed.
A () illustrates front sprocket wheel as bicycle sprocket citing in the 1st and the 2nd embodiment, but, this
Bright it is not limited to this.Rear sprocket wheel can also be applied the present invention to.
B () in bicycle crank assembly, is arranged in all of multiple sprocket wheels in the 1st and the 2nd embodiment
The 1st different tooth of axial width and the 2nd tooth, but, the present invention is not limited to this.Only can also be made up of the 2nd tooth
Arbitrary sprocket wheel (the 2nd and/or the 3rd sprocket wheel of such as path).
C (), in the 1st and the 2nd embodiment, the 1st tooth is seen from the outside of the direction of footpath and is formed+shape or T-shaped, but
It is that the present invention is not limited to this.For example, it is also possible to be other shapes such as diamond shaped, trapezoidal shape, triangle, hexagonal configuration
Shape.
D (), in the 1st and the 2nd embodiment, the 1st speed change region 34 has the 2nd projection 36b, but it is also possible to not set
Put the 2nd projection 36b.
E () makes the quantity of multiple sprocket wheel installing arms 24 be 4 in the 1st and the 2nd embodiment, but, sprocket wheel is installed
The quantity of arm is not limited to 4.
F (), in the 1st and the 2nd embodiment, sprocket body and multiple teeth are integrally formed respectively, but, the present invention
It is not limited to this.Can also be sprocket body and multiple teeth be split.For example, it is also possible to be to make multiple teeth for metal system, example
Sprocket body is such as made for the synthetic resin systems such as carbon fibre fortified resin or the metal system different from teeth portion (for example, the light gold such as aluminum
Category system), seek lightness.
G () can also be that the speed change region of each sprocket wheel includes-the 2nd tooth 32b of (bearing) shape, the 4th tooth 42b, the 6th tooth 52b.
Symbol description
2：Chain；2a：Link plate；2b：Inner link plate；10、110：Bicycle crank assembly；12：Crank arm；
14：1st sprocket wheel；16：2nd sprocket wheel；18：3rd sprocket wheel；30：1st sprocket body；32：Tooth (multiple teeth)；32a：1st tooth；32b：
2nd tooth；32c：1st gear teeth；32d：1st spigot surface；34：1st speed change region；36a：1st projection；36b：2nd projection；38：
Recess；40：2nd sprocket body；42：Tooth (multiple teeth)；42a：3rd tooth；42b：4th tooth；42c：2nd gear teeth；42d：2nd leads
To face；44：2nd speed change region；50：3rd sprocket body；52：Tooth (multiple teeth)；52a：5th tooth；52b：6th tooth；52c：3rd
Gear teeth；52d：3rd spigot surface；54：3rd speed change region；W1：1st maximum direction of principal axis width；W2：2nd maximum direction of principal axis width
Degree；W3：3rd maximum direction of principal axis width；W4：4th maximum direction of principal axis width；W5：5th maximum direction of principal axis width；W6：6th is maximum
Direction of principal axis width.
Claims (27)
1. a kind of bicycle sprocket, is the bicycle sprocket with Pivot axle that can engage with chain, and its feature exists
In possessing
Sprocket body,
Be configured in the circumferential direction multiple teeth on the outside of the footpath direction of aforementioned sprocket body,
At least one speed change region,
Aforesaid plurality of tooth includes at least one the 1st teeth with the 1st maximum direction of principal axis width and has the 2nd maximum direction of principal axis width
At least one the 2nd teeth, the aforementioned 2nd maximum direction of principal axis width of aforementioned 1st maximum direction of principal axis width ratio is big,
Aforementioned 1st tooth is formed to engage with the link plate of aforementioned chain,
Aforementioned 2nd tooth is formed to close with the inner link board of aforementioned chain,
Aforementioned 1st tooth includes the gear teeth for being contained in aforementioned speed change region,
Aforementioned gear teeth is seen from the outside of the direction of footpath and is formed T-shaped.
2. bicycle sprocket as claimed in claim 1, it is characterised in that aforesaid plurality of tooth includes multiple aforementioned 1st teeth.
3. bicycle sprocket as claimed in claim 1, it is characterised in that aforesaid plurality of tooth includes multiple aforementioned 2nd teeth.
4. bicycle sprocket as claimed in claim 1, it is characterised in that aforesaid plurality of tooth include multiple aforementioned 1 and
Multiple aforementioned 2nd teeth.
5. bicycle sprocket as claimed in claim 4, it is characterised in that aforesaid plurality of 1st tooth and aforesaid plurality of 2nd tooth
At least a portion in the circumferential direction alternately configured.
6. bicycle sprocket as claimed in claim 1, it is characterised in that aforementioned 1st tooth and aforementioned 2nd tooth are adjacent to joins
Put.
7. bicycle sprocket as claimed in claim 1, it is characterised in that aforementioned 1st tooth is seen from the outside of the direction of footpath and is formed
For+shape.
8. bicycle sprocket as claimed in claim 1, it is characterised in that the maximum direction of principal axis width in the aforementioned 1st of aforementioned 1st tooth
Spend the scope in more than 2.5mm, below 5.4mm.
9. bicycle sprocket as claimed in claim 8, it is characterised in that the maximum direction of principal axis width in the aforementioned 1st of aforementioned 1st tooth
Spend the scope in more than 3.0mm, below 4.5mm.
10. bicycle sprocket as claimed in claim 1, it is characterised in that the maximum direction of principal axis in the aforementioned 2nd of aforementioned 2nd tooth
Width is in the scope of more than 1.5mm, below 2.3mm.
11. bicycle sprockets as claimed in claim 1, it is characterised in that aforementioned speed change region includes to be arranged on aforementioned
The gear teeth at least on any one of multiple teeth.
12. bicycle sprockets as claimed in claim 11, it is characterised in that aforementioned gear teeth has to be carried out to aforementioned chain
The spigot surface of guiding.
13. bicycle sprockets as claimed in claim 1, it is characterised in that aforementioned speed change region includes to be formed to prop up
Support at least one projection of aforementioned chain.
14. bicycle sprockets as claimed in claim 11, it is characterised in that aforementioned speed change region includes to be formed to prop up
Support at least one projection of aforementioned chain.
15. bicycle sprockets as claimed in claim 13, it is characterised in that aforementioned at least one projection includes to be formed
Can support the 1st projection and the 2nd projection of aforementioned chain.
16. bicycle sprockets as claimed in claim 15, it is characterised in that aforementioned 1st projection and aforementioned 2nd projection away from
Long from the long side direction length of the outer link than aforementioned chain and at least one party of the inner link of aforementioned chain.
17. bicycle sprockets as claimed in claim 15, it is characterised in that aforementioned 1st projection and aforementioned 2nd projection away from
From identical or short compared with the long side direction length of the outer link of aforementioned chain and at least one party of the inner link of aforementioned chain.
18. bicycle sprockets as claimed in claim 1, it is characterised in that aforementioned speed change region include to be configured in front
State the recess on the inside of the footpath direction that the bottom of the tooth portion of multiple teeth compares.
19. bicycle sprocket as claimed in claim 14, it is characterised in that aforementioned speed change region include to be configured in front
State the recess on the inside of the footpath direction that the bottom of the tooth portion of multiple teeth compares.
20. bicycle sprocket as claimed in claim 1, it is characterised in that aforementioned speed change region is set multiple.
21. bicycle sprockets as claimed in claim 20, it is characterised in that aforementioned speed change region is at least set a pair.
22. bicycle sprockets as claimed in claim 1, it is characterised in that be front sprocket wheel.
A kind of 23. multistage rear sprocket wheel assemblies, it is characterised in that possess the 1st sprocket wheel and aforementioned 1st sprocket wheel of gear ratio few the 2nd
Sprocket wheel,
Aforementioned 1st sprocket wheel has
1st sprocket body,
Be configured in the circumferential direction multiple teeth on the outside of the footpath direction of aforementioned 1st sprocket body,
At least one speed change region,
Aforesaid plurality of tooth includes at least one the 1st teeth with the 1st maximum direction of principal axis width, has the 2nd maximum direction of principal axis width
At least one the 2nd teeth, the aforementioned 2nd maximum direction of principal axis width of aforementioned 1st maximum direction of principal axis width ratio is big,
Aforementioned 1st tooth is formed to engage with the link plate of aforementioned chain,
Aforementioned 2nd tooth is formed to close with the inner link board of aforementioned chain,
Aforementioned 2nd sprocket wheel has
2nd sprocket body,
In the circumferential direction be configured in multiple teeth on the outside of the footpath direction of aforementioned 2nd sprocket body,
Multiple teeth of aforementioned 2nd sprocket wheel are only made up of aforementioned 2nd tooth.
24. a kind of multistage rear sprocket wheel assemblies, it is characterised in that possess the 2nd few chain of the 1st sprocket wheel, aforementioned 1st sprocket wheel of gear ratio
Wheel and the 3rd few sprocket wheel of aforementioned 2nd sprocket wheel of gear ratio,
Aforementioned 1st sprocket wheel has
1st sprocket body,
Be configured in the circumferential direction multiple teeth on the outside of the footpath direction of aforementioned 1st sprocket body,
At least one speed change region,
Aforesaid plurality of tooth includes at least one the 1st teeth with the 1st maximum direction of principal axis width, has the 2nd maximum direction of principal axis width
At least one the 2nd teeth, the aforementioned 2nd maximum direction of principal axis width of aforementioned 1st maximum direction of principal axis width ratio is big,
Aforementioned 1st tooth is formed to engage with the link plate of aforementioned chain,
Aforementioned 2nd tooth is formed to close with the inner link board of aforementioned chain,
Aforementioned 2nd sprocket wheel has
2nd sprocket body,
In the circumferential direction be configured in multiple teeth on the outside of the footpath direction of aforementioned 2nd sprocket body,
At least one speed change region,
Aforesaid plurality of tooth includes at least one aforementioned 1st tooth and at least one aforementioned 2nd tooth,
Aforementioned 3rd sprocket wheel has
3rd sprocket body,
In the circumferential direction be configured in multiple teeth on the outside of the footpath direction of aforementioned 3rd sprocket body,
Multiple teeth of aforementioned 3rd sprocket wheel are only made up of aforementioned 2nd tooth.
A kind of 25. bicycle sprockets, are the bicycle sprockets with Pivot axle that can engage with chain, and its feature exists
In possessing
Sprocket body,
Be configured in the circumferential direction multiple teeth on the outside of the footpath direction of aforementioned sprocket body,
At least one speed change region,
Aforesaid plurality of tooth includes at least one the 1st teeth with the 1st maximum direction of principal axis width and has the 2nd maximum direction of principal axis width
At least one the 2nd teeth, the aforementioned 2nd maximum direction of principal axis width of aforementioned 1st maximum direction of principal axis width ratio is big,
Aforementioned 1st tooth is formed to engage with the link plate of aforementioned chain,
Aforementioned 2nd tooth is formed to close with the inner link board of aforementioned chain,
The maximum direction of principal axis width in the aforementioned 1st of aforementioned 1st tooth is in the scope of more than 2.5mm, below 5.4mm.
26. bicycle sprockets as claimed in claim 25, it is characterised in that the maximum direction of principal axis in the aforementioned 1st of aforementioned 1st tooth
Width is in the scope of more than 3.0mm, below 4.5mm.
27. bicycle sprockets as claimed in claim 25, it is characterised in that the maximum direction of principal axis in the aforementioned 2nd of aforementioned 2nd tooth
Width is in the scope of more than 1.5mm, below 2.3mm.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361824568P | 2013-05-17 | 2013-05-17 | |
| US61/824,568 | 2013-05-17 | ||
| US14/053,630 US9701364B2 (en) | 2013-05-17 | 2013-10-15 | Bicycle sprocket and bicycle crank assembly |
| US14/053,630 | 2013-10-15 | ||
| CN201310697890.1A CN104163227B (en) | 2013-05-17 | 2013-12-18 | Bicycle sprocket and bicycle crank assembly |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310697890.1A Division CN104163227B (en) | 2013-05-17 | 2013-12-18 | Bicycle sprocket and bicycle crank assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106428399A true CN106428399A (en) | 2017-02-22 |
| CN106428399B CN106428399B (en) | 2019-09-03 |
Family
ID=51894713
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611085719.5A Active CN106428399B (en) | 2013-05-17 | 2013-12-18 | Sprocket wheel assembly after bicycle sprocket and multistage |
| CN201310697890.1A Active CN104163227B (en) | 2013-05-17 | 2013-12-18 | Bicycle sprocket and bicycle crank assembly |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310697890.1A Active CN104163227B (en) | 2013-05-17 | 2013-12-18 | Bicycle sprocket and bicycle crank assembly |
Country Status (3)
| Country | Link |
|---|---|
| US (3) | US9701364B2 (en) |
| CN (2) | CN106428399B (en) |
| TW (3) | TWI572800B (en) |
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| CN110621573A (en) * | 2017-05-12 | 2019-12-27 | 米兰达兄弟有限公司 | Narrow and wide fluted disc |
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Also Published As
| Publication number | Publication date |
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| CN104163227B (en) | 2017-04-12 |
| US20180312220A1 (en) | 2018-11-01 |
| US20140338494A1 (en) | 2014-11-20 |
| CN106428399B (en) | 2019-09-03 |
| US10562589B2 (en) | 2020-02-18 |
| TW201723355A (en) | 2017-07-01 |
| US20170066500A1 (en) | 2017-03-09 |
| US10040510B2 (en) | 2018-08-07 |
| TWI617752B (en) | 2018-03-11 |
| TWI579476B (en) | 2017-04-21 |
| CN104163227A (en) | 2014-11-26 |
| TW201710611A (en) | 2017-03-16 |
| TW201445064A (en) | 2014-12-01 |
| US9701364B2 (en) | 2017-07-11 |
| TWI572800B (en) | 2017-03-01 |
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